Dark mode is

The ultimate stop for AR-15 Rifles and AR-15 parts

We are one of the largest online sources for quality AR-10 and AR-15 rifles, parts and accessories. Shop our selection of complete and stripped Uppers and Lowers, find Barrels and Ammo for your firearms, gear yourself up with quality Gear and Apparel. We have it all!

Rainier Arms was started by enthusiasts for enthusiasts. We specialize in high-end AR-15/M16 rifles, parts and accessories. If we won't use it, we won't sell it.

We offer a wide variety of firearms and firearm parts from all your favorite manufacturers. Satisfy your needs from brands such as Glock, SIG, S&W, Primary Arms, Stag Arms, PWS, Rainier Arms and many others. Browse all manufacturers.

Great store for high-end firearms. Very very knowledgeable staff.
Rainier Arms is my go to dealer for high-end AR15 parts and accessories online. They always have a great selection of parts in stock. Many you can't find anywhere else.
Great shop with easy order pick up for locals making online purchases.

Latest Blog Posts

  • Build of the week: Rose’s Personalized Springfield SAINT® Victor Pistol Build List

    Something we’re always excited to receive are builds from our customers on their very specialized firearms! And of course, nothing is more near and dear to our hearts than a well built AR15 rifle! The following was submitted to us by Rose to share! Great lit...

    Posted By: rainierblog

    Posted On: April 16 2021

  • EDC for Beginners

    Buying your first handgun for personal protection? Read this first  The Newbie Guide to Buying a handgun With the uptick in crime recently, now more than ever, we see more interest by new firearms owners in protecting themselves and those they love....

    Posted By: rainierblog

    Posted On: April 13 2021

  • Build of the Week for His and Hers

     This weeks Build of the Week is a pair of Sig Sauer P365 pistols customized for our Purchasing Director and his Wife for EDC. Except we are using a bit of a cheat code, as the majority of the modifications were done by the good folks at Da...

    Posted By: rainierblog

    Posted On: September 18 2020

  • Best Sig Sauer P320 upgrades – 2020 Part 1 of 2: The Upper Half

    The Sig Sauer P320 has been, without a doubt, one of the more exciting pistol platforms introduced in the past decade. This is, measured based on military and law enforcement adoption, popularity within the competitive communities, and the vast aftermarket sup...

    Posted By: Aristotle Bartolome

    Posted On: August 13 2020